Battery charger



FIG. 1 is a front, top, and right-side perspective view of a battery charger showing our new design;

FIG. 2 is a right-side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left-side elevational view thereof; and

FIG. 6 is a rear, top, and left-side perspective view thereof, the plug prongs rotated into a position perpendicular to the body. 

The ornamental design for a battery charger, as shown. 